Update the navbar in the observatory

runtime/bin/vmservice/client/lib/src/observatory/isolate_manager.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of observatory;
 
 /// Collection of isolates which are running in the VM. Updated
 class IsolateManager extends Observable {
   ObservatoryApplication _application;
   ObservatoryApplication get application => _application;
@@ skipping 11 matching lines @@
         _updateIsolates(response['members']);
       }
     });
   }
 
   Isolate getIsolate(String id) {
     Isolate isolate = isolates[id];
     if (isolate == null) {
       isolate = new Isolate.fromId(id);
       isolates[id] = isolate;
-      return isolate;
+    }
+    if (isolate.vmName == null) {
+      // First time we are using this isolate.
+      isolate.refresh();
     }
     return isolate;
   }
 
   void _updateIsolates(List<Map> members) {
     // Find dead isolates.
     var deadIsolates = [];
     isolates.forEach((k, v) {
       if (!_foundIsolateInMembers(k, members)) {
         deadIsolates.add(k);
       }
     });
     // Remove them.
     deadIsolates.forEach((id) {
       isolates.remove(id);
     });
     // Add new isolates.
     members.forEach((map) {
       var id = map['id'];
       var isolate = isolates[id];
       if (isolate == null) {
         isolate = new Isolate.fromMap(map);
         isolates[id] = isolate;
       }
       isolate.refresh();
     });
   }
 }